<div class="ui-grid-row-header-cell ui-grid-expandable-buttons-cell">
  <div class="ui-grid-cell-contents">
    <i class="clickable"
       ng-if="!(row.groupHeader==true || row.entity.subGridOptions.disableRowExpandable)"
       ng-class="{ 'ui-grid-icon-plus-squared' : !row.isExpanded, 'ui-grid-icon-minus-squared' : row.isExpanded }"
       ng-click="grid.api.expandable.toggleRowExpansion(row.entity, $event)"
       aria-expanded="{{!!row.isExpanded}}">
    </i>
  </div>
</div>
